msm: kgsl: Add a new command submission API

Add an new ioctl entry point for submitting commands to the GPU
called IOCTL_KGSL_SUBMIT_COMMANDS.

As with IOCTL_KGSL_RINGBUFFER_ISSUEIBCMDS the user passes a list of
indirect buffers, flags and optionally a user specified timestamp. The
old way of passing a list of indirect buffers is no longer supported.

IOCTL_KGSL_SUBMIT_COMMANDS also allows the user to define a
list of sync points for the command. Sync points are dependencies
on events that need to be satisfied before the command will be issued
to the hardware.  Events are designed to be flexible.  To start with
the only events that are supported are GPU events for a given context/
timestamp pair.

Pending events are stored in a list in the command batch. As each event is
expired it is deleted from the list. The adreno dispatcher won't send the
command until the list is empty.  Sync points are not supported for Z180.

CRs-Fixed: 468770
Change-Id: Ic0dedbad5a5935f486acaeb033ae9a6010f82346
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>